US640868A - Syringe. - Google Patents

Description

. Patented lan. 9,1900.

L. BRING.

S Y RI N G E (Application filed Mar. 9, 1899.)

(No Model.)

llllWlllll" A 7TORNEYS 'S' in both'through the two central openings 4 li 3.1. In a syringe, a barrel, a piston therein,

LARS BRING, OF STOCKHOLM, SWEDEN.-

SY RI NGE.

SPEGIFIGATION forming part of Letters Patenhhlafidflfids, dated danuarye, 1900.

Application filedMarch 9, 1899- Serial No. 708,431. (No model.)

To all whom it may concern.-

Be it known that I, LABS BRING, a subject of the King of Sweden and Norway, residing at Stockholm, Sweden, have invented a new and useful Syringe, of which the followingis a specification.-

The presentinvention relates to such a construction of syringes that they can be filled more quickly than they are emptied.

In the accompanying drawings, Figure 1 illustrates a longitudinal section of this improved syringe during filling, and Fig. 2 a section of its forward end in position for the forcing out of the liquid. Fig. 3 illustrates the syringe viewed from its forward end.

a 1 is the piston, and 2 the cylinder orbarrel. The latter, according to the present invention, is provided at its forward'end 3, besides the usual central discharge-opening 4, to

which the nozzle'is usually attached, with one,

7 two, (as'inthedraw-ingsfl'orniore" apertures 5, and, moreover, there is placed close outside said end a cap, disk, or cover 6, with apertures 7 8, one of which 7 lies opposite the discharge-opening 4, while the other or others 8 are so located that when the cap is turned into a certain position'they will come opposite the apertures 5. In order to facilitate the rotation of the disk or cap 6 when the forward end of the syringe'is dipped in the liq-' uid to be drawn in, the said cap should preferably be connected with a tube or sleeve 9, closely surrounding the cylinder or barrel of the syringe. On the circumference of said tube or sleev'e there is'suitably. placed a pin "10 or other indicator, as also the barrel is l2. 13 is a packing inserted between the cap 6 and the forward part of the syringe.

. tom piece of the syringe, and by subsequently withdrawing the piston the liquid is drawn and andthrough the other apertures 5 8.

When the syringe is to be emptied, the cap 6 is so rotated that its apertures 8 will fall at one side of the corresponding apertures 5, Fig. 2, the latter being thus closed by the cap, and when the piston is subsequently forced outward the liquid is driven out through the central openings 4 7.-

From the above'it may be evident that such a syringe can be filled almost instantaneously. This is impossible with the ordinary syringes, which are not iilled by far by a single suction operation.

The syringe is more especially adapted for use where the liquid is to be forced out in the shape of a very fine jet2'. 12., when the aperture 4: is very small. In this case, however, a considerable force on the piston is required for forcing out the liquid through the small discharge aperture, and therefore with a View to facilitating the advance of the piston therehiay be placed a spiral spring 14 behind the latter, said spring tcndin g to keep the piston pressed forward. A still better plan is, however, to place behind the piston a disk 15 and between this disk and the cylinder-head 16 the spiral spring, while the disk by means of one or more cords or flexible connections 17, passing through the head end, is connected with a winding-drum 18, provided with a detent 19. This device furnishes a convenient means of withdrawing the disk 15 by rotating the drum l8 and of thus placing the spring 14 in tension,so thatthe piston can be easily withdrawn. The piston may be connected with the handles 20 by means of a rod or cord 21, passing through the disk 15. When the piston 1 has been drawn up far enough to be in contact with said disk, liquid having in the meantime entered the cylinder, it is only necessary to release the detent 19 in order that the spring 1 L shall force the disk 15 and piston 1 forward and force out the liquid previously drawn in. This c'onstruction is more especially of ad vantage in the case of liquids which are to be ejected very hot and therefore must be sucked in quickly.

Having now particularly described and ascertained the natureof mysaid invention and in what manner the same is to be performed, I declare that what I claim is "s did barrel having a discharge-opening, an

inlet-opening independent of the disehaigeopening and a cover feesaid inlet-opening rotatable across the same in eiesing or opening the same and adjusted by hand, substantially as describefi.

2. In combination in a syringe, a. barrel, a piston therein, said barrel having an opening 5 at its fcrward end, a. rotary cap carried by the from end of the barrel and having an opening to registezwhen the eever is turned with the opening 5 and having also an opening in line with the discharge-opening leading from the barrel, substantially as described.

3. In combinaeion in a. syringe, a barrel, a piston: therein, seiai barrel hevinge dischargeopening and an opening 5 at its end, a rotary cover having a, discharge-opening in line with the discharge-opening of the barrel and having eiso an opening 8 adapted when the cover i8 turned id i-egister with the opening 5 end the spring within the barrel acting on the piston, substantially as described.

4. In combination in a syringe, the barrel having the openings e, 5, at its end, a. rotary cever fitted to the end of the barrel and having the openings '7 and 8, a piston in the herrel, a. disk in rear of the piston, a, drum atthe end of the barrel, a pawl for holding the drum a spring in rear of the disk and flexible connections between the drum and the disk, sub stantiaiiy as described.

In witness whereof I have hereunto set my hand in presence of (awe witnesses.

LABS BRING.

Viitn esses:

H. TELANDER, T. RXSBERG.

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